Nail



March 1927' F. P. LEONARD NAIL Original Filed Jan. 25, 1923 3 l f ldhwll 4 m l fll w/ fi 1 I 5:, V. g C u m .F'PEL 0? i Patented Man 8, 1927.

UNITED STATES PATENT-OFFICE.

, FRANK r. LEONARD. or TROY, NEW' ronx, assrenon or ONE-HALF TO rnnnnmcno.

" I cmnssnns, or TROY, new roan.

NAIL.

Original application filed January 25, 1923, Serial No.'614.900. Divided and this Septembr18f1925. Serial No. 57,206. a

This invention relates to improvements in nails or analogous fastening elements, and is a divisional application upon case Serial Number 614,900; filed by me on January 25,

1923, which application matured into Let ters Patent #1,557,711, dated Qctober 20,

The primary object ofthis invention is the provision ofa nail particularly well adapt- 10 ed for the securing of composition wall materials, such as plaster board, fiber board, wood board. and the like.-

A further object of this invention is the provision of a nail or analogous fastening l5 element which is adaptedto interlock with an article into which the same is driven. in such a manner as to prevent the same from working loose incident to ordinary shocks and vibrations. I

Afurther object of the invention isthe provision of a driven headed fastening element embodying an arrangement of barbs or projections on the' shank thereof. so arranged. as to permit of the nail being economically constructed in one operation, as by means of a die, so that there are no features of the fastening element which would make the cost of the same prohibitive.

Other obiects and advantages of' this invention will be apparent during the course of the following detailed description.

In the accompanying drawing. forming a part of this specification. and wherein simrlar reference characters designate corresponding partsthroughout the reveral views. Figure 1 is a perspective view of the im' proved nail.

Figure 2. 's a side elevation of the improved nail.

direction of the arrows; and. i v

Figure 4 1s a cross sectlonal view taken through a composition wall material. such Figure 3 is an enlarged transverse section on line 3-3 of Figure 2, looking in the as plaster board, showing the manner in which the same rssecured 'upon s-tuddmg or studding or analogous framing B, as by means of an improved fastening element or nail C. Q

It is well known .to carpenters, lasterers, and others skilled in'building construction, that composition board or wall material is application filed very difficult to maintain in a secure and durable manner upon studding and analo gous framing, primarily incident to the fact that nails which ordinarily fasten the same work loose either during the attachment of the compositionboard or wall material. or

incident to shock or vibrations of the wall material which are placed upon the same when placing the trim. finishing coatings, or performing other like operations. Such loosening of the ordinary fastening nail element not'only loosens the board material from the studding or framing. butalso cracks the finishing coating uponthe composition boarding or material. due to moving engagement of the head of the ordinary fastening nail therewith. I

Referring to the construction of the improved fastening element C. the same includes a shank 10. preferably cylindrical, and of any desired length. having the inserting end 11 thereof pointed. and having a relatively wide head 12 on the opposite end cumference of the shank. This ri 15 may he wedge-shaped incross section nd have the lower end 16 thereof preferably tapering into the outer surface ofthe shank 10, in spaced relation above the shank point 11. At the upper end of the spiral rib 15. the

same provides a fiat triangular-shaped face 17. disposed in a plane coincident with the axis of the shank, and at a point on the circumference of the shank, 90 from the ta- .nered lower end 16 of the spiral rib. and as is clearly illustrated in Figure 3. Formed on the shanklO above the spiral rib 15, are

diametricallv opposed barbs 20 and 21, which may be polygonal in formation, and which lie wholly to one side of the diametrie cal plane of the shank. and to that side at which the spiral rib 15 is disposed. These barbs 20 and 21 in the same-plane with ually away from the fiber of the wood,

- striction by of excessive mutilation of the fiber of the .nail head trated in Figure 2.

provide upper, rather abrupt shoulders 23 in facing relation toward the nail head 12, and may have their lower rear surfaces taper into the shank in any approved manner". The barb 20 is preferably disposed directly above the upper end of the spiral rib 15. The barbs 20 and 21 each provide flat triangular shaped faces 25, lying) the face 17 of the spiral rib l5. and facing in'the same direction therewith; The upperabrupt shoulders 23 of-the barbs 20 and 21 may taper grad-;

the faces 25. sothat the nail may be readily driven, without undue rethe barbs and without liability material in which the nail is driven. It is to be noted that the spiral 1% is substantial 1y midway of the barbs and the pointed end 11.0f the shank 10-, while the barbs and 21 are spaced sufficient distance below the 12 that when the nail is ,driven home through the wall material, the barbs will'be disposed but a slight distance below the surface of the studding or framing into which the nail is driven.

The head 12 maybe of any approved formation for anchoring of a finishing coating placed thereover, and in the example shown is provided with upturned edgepor tions which may be slightly a-rcuated over the outer surfaceof the head as illus- The function of the nail in niaintaining the composition wall material upon studding or framingis illustrated in Figure 4 of the drawing. The nail upon being driven into the studding B is rotated. by engageincluding a shank portion having a spiral, rib of wedge shape in cross section and ment of the spiral rib 1'5 with the wood fibers, for substantially 90, and after the barbs 20 and 21 have passed into the material of the stud B, the same will neatly cut Without ufiduly mutilating the same, and merely push the fibers A back, so that said fibers will spring in closing relation over the shoulders 23 of the hars'20 and 21, when the nail-isentirely driven, as 'is illustrated in Figure 4. The head 12 of the nail may be slightly counter; sunk into the outer surface. of the composi-' tion wall or board as is illustrated in Figure 4. and be retained m such countersunk relation incident to the effective locking function of the nail in the studding B. Due to the fact that the nail is in secure locked relation to maintain the material A firmly against the studding B, there will be no liability of loose play of the nail head upon the composition material A.

It will be observed that by so disposing shank, said spiral rib material A, substantially cost of theanail prohibitive.

'-Various changes in the shape, size, and arrangement of parts may be made to the specific form of invention herein shown and described, without departing from the spirit of the invention or the scope of the claims.

I I claim:

1. As an articleof manufacture, a nail having a shank portion extending laterallyt thereof and terminating inwardly of the ends of said shank, said rib having the lower end thereof merging into theshank of said nail and having the upper end thereof providing a flat surface disposed in a plane parallel withvthe longitudinal axis of the being formed for not more than 90 about said shank. r p

2. As an article'of manufacture, a nail including a shank portion having a spiral rib having a spiral rib I and 21; plane coincident of the outer surface extending laterally from the outer surface 7 thereof and continuing for substantially one-quarter turn about said shank. said spiral rib providing an abrupt flat side surface at the upper end thereof, said shank having laterally extending barbs disposed at diametrically opposed points in spaced relation above said spiral rib, said barbs providingflat side surfacesfaci'ng in rection circim'ife'rentially as the flat side surface ofsaid spiral rib. I

3. As'an article of manufacture, a nail in a diametrical plane of the shank and facing in one general direction, and said barbs having inclined surfaces rovidin wedges facing in the direct opposite direction from the triangular surfaces and lying wholly to that side-of the diametrical plane of the shank to which the spiral rib is disposed.

4. As an article of manufacture, 'a nail including a shank portion having a spiral rib and barbs extending laterally therefrom, said rib and'barbs providing triangular shaped flat surfaces facing in one dithe same direction and disposed in a like plane, said plane passing through the longitudinal axis of the shank.

FRANK P. LEQNARD. 

